ClangFunctionDifferenceBear.rst

ClangFunctionDifferenceBear

Retrieves similarities for code clone detection. Those can be reused in another bear to produce results. Postprocessing may be done because small functions are less likely to be clones at the same difference value than big functions which may provide a better refactoring opportunity for the user.

Supported Languages

• C
• C++
• CUDA
• Objective-C
• Objective-C++
• OpenCL
• OpenMP

Settings

Setting	Meaning
average_calculation	If set to true the difference calculation function will take the average of all variable differences as the difference, else it will normalize the function as a whole and thus weighting in variables dependent on their size. (Optional, defaults to 'False'.)
counting_conditions	A comma seperated list of counting conditions. Possible values are: used, returned, is_condition, in_condition, in_second_level_condition, in_third_level_condition, is_assignee, is_assigner, loop_content, second_level_loop_content, third_level_loop_content, is_param, in_sum, in_product, in_binary_operation, member_accessed. Weightings can be assigned to each condition due to providing a dict value, i.e. having used weighted in half as much as other conditions would simply be: "used: 0.5, is_assignee". Weightings default to 1 if unset. (Optional, defaults to 'OrderedDict([(<function used at 0x7fefd5312620>, 0.0), (<function returned at 0x7fefd53126a8>, 1.4), (<function is_condition at 0x7fefd53127b8>, 0.0), (<function in_condition at 0x7fefd5312840>, 1.4), (<function in_second_level_condition at 0x7fefd53128c8>, 1.4), (<function in_third_level_condition at 0x7fefd5312950>, 1.0), (<function is_assignee at 0x7fefd53129d8>, 0.0), (<function is_assigner at 0x7fefd5312a60>, 0.6), (<function loop_content at 0x7fefd5312b70>, 0.0), (<function second_level_loop_content at 0x7fefd5312bf8>, 1), (<function third_level_loop_content at 0x7fefd5312c80>, 1), (<function is_param at 0x7fefd5312d08>, 2.0), (<function is_called at 0x7fefd5312d90>, 1.4), (<function is_call_param at 0x7fefd5312e18>, 0.0), (<function in_sum at 0x7fefd5312400>, 2.0), (<function in_product at 0x7fefd5312488>, 0.0), (<function in_binary_operation at 0x7fefd5312510>, 1), (<function member_accessed at 0x7fefd5312598>, 1)])'.)
exp_postprocessing	If set to true, the difference value of big function pairs will be reduced using an exponential approach. (Optional, defaults to 'False'.)
extra_include_paths	A list containing additional include paths. (Optional, defaults to '()'.)
poly_postprocessing	If set to true, the difference value of big function pairs will be reduced using a polynomial approach. (Optional, defaults to 'True'.)